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This paper presents a hierarchical modeling strategy of the driving behavior based on the multiple levels of abstraction of the underlying dynamics. In order to realize this idea, a new mathematical model, Hierarchical PieceWise ARX model (Hi-PWARX model) is proposed. The identification scheme for the Hi-PWARX model is developed by synthesizing the ideas of a feature vector definition revealing the dynamical characteristics and an unsupervised clustering technique. By applying the Hi-PWARX model to the observed driving data, a consistent hierarchical behavior model is obtained without any prior knowledge. The usefulness of the proposed modeling is demonstrated by the analysis of the driving behavior on the express way.
Date of Conference: 19-22 Sept. 2010